KAMA-TECH (HK) LIMITED Patent applications |
Patent application number | Title | Published |
20160116577 | PSEUDO-STABILIZATION TECHNIQUE FOR LASER-BASED SPEED AND RANGEFINDING INSTRUMENTS UTILIZING A RATE GYROSCOPE TO TRACK PITCH AND YAW DEVIATIONS FROM THE AIMING POINT - A pseudo-stabilization technique for laser-based speed and rangefinding instruments utilizing a rate gyroscope to monitor the device pitch and yaw motion to operationally increase the effective range of the device by serving to obviate the emission of laser pulses off-target. In this manner, the pulse firing rate can be increased when the instrument is correctly aimed at the target as well enabling the concomitant emission of pulses with greater energy while remaining within the applicable Class 1 eye-safety constraints. | 04-28-2016 |
20160116278 | LASER SOURCE MODIFICATION TECHNIQUES FOR A LASER-BASED RANGEFINDING OR SPEED MEASUREMENT INSTRUMENT ENABLING INCREASED RANGE WITH IMPROVED ACCURACY - Laser source modification techniques for a laser-based rangefinding or speed measurement instrument enabling increased range, better defined beam pattern and improved accuracy through the use of diffusers and/or spatial filters while still remaining within applicable Class 1 eye-safety limits. | 04-28-2016 |
20150377618 | COMPACT FOLDED SIGNAL TRANSMISSION AND IMAGE VIEWING PATHWAY DESIGN AND VISUAL DISPLAY TECHNIQUE FOR LASER RANGEFINDING INSTRUMENTS - A compact folded signal transmission and image viewing pathway design and visual display technique for laser rangefinding instruments incorporates a beam splitting cube in the eyepiece optical space and advantageously provides an objective image focal length substantially twice that of the physical length of the instrument optical components. Through the use of some of the same optical elements in both the image viewing pathway as well as the laser transmission pathway, a relatively long transmission focal length is provided which saves in both physical instrument space and component cost while also allowing for the use of reasonably sized photodiodes with improved power output over that of previous designs. | 12-31-2015 |
20150276921 | NON-SATURATING RECEIVER DESIGN AND CLAMPING STRUCTURE FOR HIGH POWER LASER BASED RANGEFINDING INSTRUMENTS - A non-saturating receiver design and clamping structure for high power laser rangefinders of especial utility with respect to pumped, monoblock lasers. The receiver comprises a photodiode and a transimpedance amplifier having at least first and second stages. The first stage comprises a field effect transistor and the second stage comprises a non-saturating, non-inverting amplification stage including a differential pair of bipolar transistors having a feedback path coupling the second stage to the input of the first stage. A clamping structure for the receiver comprises a resistor coupling a cathode of the photodiode to a first voltage input and a clamping diode also coupling the cathode to a second lower voltage input. A capacitor having a capacitance C | 10-01-2015 |
20140071432 | SYSTEM AND METHOD FOR A RANGEFINDING INSTRUMENT INCORPORATING PULSE AND CONTINUOUS WAVE SIGNAL GENERATING AND PROCESSING TECHNIQUES FOR INCREASED DISTANCE MEASUREMENT ACCURACY - A system and method for a rangefinding instrument incorporating pulse and continuous wave signal generating and processing techniques for increased distance measurement accuracy. The use of the former technique effectively solves the ambiguity issues inherent in the latter while allowing for relatively simple circuit implementations. Thus, a potentially more accurate phase-based distance measurement technique can be utilized which is also completely independent of the maximum range to the target. | 03-13-2014 |
20140071426 | SELF-ALIGNED AIMING SYSTEM AND TECHNIQUE FOR A LASER RANGEFINDER INCORPORATING A RETROREFLECTOR - A self-aligned aiming system and technique for a laser rangefinder incorporating a retroreflector. In operation, a virtual dot perceived in the laser rangefinder viewing window is inherently aligned with a visible beam projected on the target and has zero parallax by design. Even if there is a slight offset in the visual pathway of the laser rangefinder, when the virtual dot in the viewing window is placed on a specific point on the target, the visual beam is located at that same specific point. | 03-13-2014 |
20140071425 | SYSTEM AND METHOD FOR SUPERIMPOSING A VIRTUAL AIMING MECHANISM WITH A PROJECTED SYSTEM BEAM IN A COMPACT LASER-BASED RANGEFINDING INSTRUMENT - A system and method for superimposing a virtual aiming mechanism with a projected system beam in a compact laser-based rangefinding instrument such as a laser-based tape measure which employs a laser rangefinding system beam and visible light beam to enable a user to merely pick up the instrument and, if the visible beam can be seen, merely aim the device without sighting by placing the resultant visible light dot on the target itself. Alternatively, if the beam cannot be seen, the user can sight through the instrument viewing aperture and see a virtual visible dot and superimpose it upon his view of the target. | 03-13-2014 |
20140071424 | COMPACT FOLDED SIGNAL TRANSMISSION AND IMAGE VIEWING PATHWAY DESIGN AND VISUAL DISPLAY TECHNIQUE FOR LASER RANGEFINDING INSTRUMENTS - A compact folded signal transmission and image viewing pathway design and visual display technique for laser rangefinding instruments incorporates a beam splitting cube in the eyepiece optical space and advantageously provides an objective image focal length substantially twice that of the physical length of the instrument optical components. Through the use of some of the same optical elements in both the image viewing pathway as well as the laser transmission pathway, a relatively long transmission focal length is provided which saves in both physical instrument space and component cost while also allowing for the use of reasonably sized photodiodes with improved power output over that of previous designs. | 03-13-2014 |
20130271744 | LASER RANGEFINDER MODULE FOR OPERATIVE ASSOCIATION WITH SMARTPHONES AND TABLET COMPUTERS - A laser rangefinding module for cable connected and/or wireless operative association with smartphones and tablet computers. In a particular embodiment of the present invention disclosed herein, the operation of the laser rangefinder module is controlled by the smartphone or tablet computer and functions through the smartphone touchscreen with the laser rangefinder results being displayed on the smartphone display. | 10-17-2013 |
20130229644 | SYSTEM AND METHOD FOR MONITORING VEHICULAR TRAFFIC WITH A LASER RANGEFINDING AND SPEED MEASUREMENT DEVICE UTILIZING A SHAPED DIVERGENT LASER BEAM PATTERN - A system and method for monitoring vehicular traffic with a laser rangefinding and speed measurement device utilizing a shaped divergent laser beam pattern. In accordance with the present invention, a traffic monitoring device is disclosed which comprises a light emitting diode having a die element producing an asymmetric beam pattern, an aperture for at least partially precluding some portion of the beam pattern in a first direction while allowing the beam pattern in a second orthogonal direction to pass therethrough and a lens associated with the aperture for causing the laser beam exiting the aperture to diverge providing a cone-like beam of laser energy. | 09-05-2013 |
20130066542 | INTELLIGENT LASER TRACKING SYSTEM AND METHOD FOR MOBILE AND FIXED POSITION TRAFFIC MONITORING AND ENFORCEMENT APPLICATIONS - An intelligent laser tracking system and method for mobile and fixed position traffic monitoring and enforcement applications. The system disclosed herein can autonomously track multiple target vehicles with a highly accurate laser based speed measurement system or, under manual control via a touch screen, select a particular target vehicle of interest. In a mobile application the police vehicle speed is determined through the OBD II CAN port and updated for accuracy though an onboard GPS subsystem. The system and method of the present invention simultaneously provides both narrow and wide images of a target vehicle for enhanced evidentiary purposes. A novel, low inertia pan/tilt mechanism provides extremely fast and accurate target vehicle tracking and can compensate for geometrical errors and the cosine effect. | 03-14-2013 |
20110279808 | FOLDED PATH LASER RANGEFINDER ARCHITECTURE AND TECHNIQUE INCORPORATING A SINGLE CIRCUIT BOARD FOR MOUNTING OF BOTH LASER EMITTING AND DETECTING ELEMENTS - A handheld, folded-path, laser rangefinder architecture and technique incorporating a single circuit board for mounting of both the laser emitting and detecting elements is disclosed. The architecture disclosed provides an efficient and low cost design for a laser rangefinder, and by eliminating the conventional provision of separate circuit boards for the laser transmitting and receiving elements, reduces the overall size of the unit and its cost of manufacture by concomitantly eliminating unnecessary interconnecting cables and the like. | 11-17-2011 |
20110221606 | SYSTEM AND METHOD FOR DETECTING A MOVING OBJECT IN AN IMAGE ZONE - A system and method for detection of a moving object in an image zone for possible use in the field of road and traffic safety related and/or gate monitoring systems includes an image sensor for imaging a field, a user interface for defining at least one detection zone within the field, a processor coupled to the user interface and the image sensor for detecting if a moving object has entered the at least one detection zone and an alarm providing a signal in response to detection of a moving object within the at least one detection zone. | 09-15-2011 |
20110187854 | INTEGRATED STILL IMAGE, MOTION VIDEO AND SPEED MEASUREMENT SYSTEM - Devices capable of capturing still and motion imagery are integrated with an accurate distance and speed measuring apparatus. By measuring the changing distance of the target over that time, a target's speed can be determined. At substantially the same time as the target's speed is determined, imagery of the target is captured in both a still and moving format. Using a queuing mechanism for both distance and imagery data along with time stamps associated with each, a target's image, both in motion and still, can be integrated with its speed. In situations in which a still image is unavailable, a target's speed can be associated with a portion of a continuous stream of motion imagery to a point where a positive identification can be captured with a still image. | 08-04-2011 |
20100202662 | VEHICLE CLASSIFICATION BY IMAGE PROCESSING WITH LASER RANGE FINDER - An image capture device captures a plurality of sequential images of a vehicle in motion. At substantially the same time a collocated rangefinder determines the distance between the vehicle and the image capture device. Each of the plurality of images may be segmented based on the rangefinder point of reference. The portion of each image representing the vehicle is extracted based on its motion with respect to a stationary background. Knowing the size of the vehicle with respect to the image and the distance that the vehicle is from the image capture device, the image data is converted to real world dimensions. Using these real world dimensions a vehicle classification is determined. | 08-12-2010 |
20100103004 | CORRELATED NOISE AND SPURIOUS SIGNAL REDUCTION - Error introduced by analog to digital conversion of a set of laser pulses can be reduced by shifting the clock reference time associated with the firing of the laser pulse. A timing offset module shifts the timing reference of each laser pulse. Digital codes generated by the ADC from the received signals are realigned and summed eliminating systematic error introduced by clock driven operations of the ADC. A comparison of the total ADC output of detected laser pulses over a select number of clock intervals enables a return signal to be distinguishable over the systematic error. | 04-29-2010 |
20090079960 | INTEGRATED STILL IMAGE, MOTION VIDEO AND SPEED MEASUREMENT SYSTEM - Devices capable of capturing still and motion imagery are integrated with an accurate distance and speed measuring apparatus. By measuring the changing distance of the target over that time, a target's speed can be determined. At substantially the same time as the target's speed is determined, imagery of the target is captured in both a still and moving format. Using a queuing mechanism for both distance and imagery data along with time stamps associated with each, a target's image, both in motion and still, can be integrated with its speed. In situations in which a still image is unavailable, a target's speed can be associated with a portion of a continuous stream of motion imagery to a point where a positive identification can be captured with a still image. | 03-26-2009 |
20080270060 | Magnetic sensor and accelerometer calibration techniques - The invention relates, in general, to the field of magnetic sensors and accelerometers and the utilization of the same as magnetometers, magnetic compasses, range finders, navigational systems and other applications. More particularly, the invention relates to effective, simplified and highly accurate techniques for calibration of magnetic sensors and accelerometers. | 10-30-2008 |